Improvement in fire-boxes for steam-boilers



2 Sheets-Sheet 1.

G. H. HOAGLAND. Fire-Box for Steam-Boilers.

ted April 23,1878.

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M.FErEns. FHOTOLITHDGRAPNER, WASHXNGTON. D O

2 Sheets-Sheet 2. G. H. HOAGLAND. Fire-Box for Steam-Boilers.

No. 202,819. Patented April 23, I878.

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UNITED STATES PATENT OFFICE.

GEORGE H. HOAGLAND, OF PORT J ERVIS, NEW YORK.

IMPROVEMENT IN FIRE-BOXES FOR STEAM-BOILERS.

Specification forming part of Letters Patent No. 202,819, dated April23, 1878; application filed January 10, 1878.

To all whom it may concern Be it known that I, GEORGE H. HOAGLAND, ofPort Jervis, in the county of Orange and State of New York, haveinvented a new and useful Improvementin the Fire-Boxes of Steam-Boilers, of which the following is a description, reference beinghad tothe accompanying drawing, forming part of this specification.

This invention is designed to be applied to boilers of various kinds,including boilers for both locomotive and stationary engines, andboilers for heating cars, buildings, and other purposes.

The invention generally consists in a novel construction and modeofattachinglining-tubes to the fire-boxes of boilers, whereby not onlyan increased amount of heating-surface isobtained, and, in theapplication of said tubes to the fire-boxes of locomotive-engineboilers, the sheets of said boxes are protected from burnin g out, butenlarged facilities are afl'orded for attaching and securing thelining-tubes to their places, free from leakage, and for separatelyremoving said tubes to replace them by others, when necessary, alsowhereby the fastenings themselves are protected from exposure to thefire, and, by the water circulating within the tubes, from excessive orinjurious heat.

The drawing, from Figure 1 to Fig. 4, inclusive, illustrates theinvention as applied to a boiler for heating railway-cars; and Figs. 5and 6 show the invention as applied to the one side, in part, of afire-box for locomotive-engine boilers.

Fig. 1 is a front view of a car-heater having the invention applied.Fig. 2 is avertical section thereof on the line ac a; Fig. 3,ahorizontal section of the same on the line y y; and Fig. 4, alongitudinal sectional view, upon a larger scale, of one of thelining-tubes of the fire-box detached. Fig. 5 is a vertical sectionthrough one side of the fire-box of a boiler for locomotive-engines withthe invention applied, and Fig. 6 a horizontal section thereof on theline 2 4;.

Referring, in the first instance, to the several figures from 1 to 4,inclusive, A is the outer case or shell of the boiler or heater,constructed to leave a water-space, B, around the firebox 0, andextending both above and below said fire-box. D is the perforatedcrown-sheet of the fire-box, connected by smoke tubes or flues b with acorrespondinglyperforated upper sheet, E, at the base of the smoke boxor chamber F, with the outlet d of which the chimney or draft-pipeconnects.

G G are the grate-bars, which are independently fitted to their places,and capable of independent removal when necessary. These bars areentered through tubes 0 in the front water-space of the boiler, and,passing over or through a guide-bridge, 0, rest at their inner endswithin cavities in the back of the fire-box. Said bars may beindependently drawn out, either as far as the bridge c or beyond it, torelieve the fire of clinkers, and may be rocked collectively to free thefire by means of a reciprocatin g bar, H. constructed to engage withcranks f on the forward ends of the grate-bars, which latter are kept intheir places, or restrained from being accidentally or improperly drawnout, by a removable locking-bar, I.

K is the fire-door, which is made self-closing either by weight orspring, so that, in case of the upsetting of the car in which the heateris arranged, the burning fuel will be prevented from scattering aboutthe car. The smokebox F is also provided with a damper or valve, L,that, in case of the car being inverted, will close the outlet d; andthe draft-inlet g to the fire-box through the ash-pit M is similarlyprovided with a valve or damper, N, capable of adjustment by means of aspring-lever, h, and fixed toothed catch i, to hold said damper in anydesired open position, but rendered selfclosing in case of the upsettingof the car. The ash-pit M is also provided with a lid or door, 0, infront, which is permanently closed except when it is required to removethe ashes.

One or more steam-pipes may be attached to the boiler or heater, forconducting the steam to and through the car or several cars in thetrain.

The interior of the fire-box O is lined with a series of upright tubes,R, which are formed with elbows S, of a T shape or construction at theiropposite ends. The outer end of each of these elbows is constructed toform a cone-joint with the fire-box sheet; and the opposite or in nerend of said elbows is constructed with a countersink or recess, k, forthe head of the bolt T, and a packing-ring or washer used to secure thetubes R to their places, said bolts T passing through said elbows S,and, through cured on the outer side by nuts I. The insertion of theheads of the bolts T in the countersink k of the inner ends of theelbows protects said heads, by the filling of the countersinks with dustor ashes, from injury by the fire, while the bolts themselves areprotected by the circulation of the water in the elbows, and by theirpassage through the water-space of the boiler. Furthermore, the T formof the elbows provides for the gases of combustion playing wholly aroundthe tubes, thus very materially adding to the heating-surface of theboiler; and said tubes, which do not require to be screwed to theirplaces, may readily and independently be attached or detached, asrequired.

To apply the invention to boilers of locomotive-engines in which it isnot convenient or practicable to run the fastening-bolts T through thewater shell or case of the fire-box, (see Figs. 5 and 6,) theelbow-shaped liningtubes are secured by screwing or securing said boltsat their outer ends within or to bridges U in the water-space B orjacket of the tire-box, and applying the tightening-nuts l to said boltswithin the countersinks or cavities k of the elbows of the tubes.

I claim- 1. The combination, with the fire-box of a steam boiler orheater having a surrounding or inclosing water space or chambers, oflinin g-tubes, constructed with elbows at their opposite ends, forestablishing communication with said water-space, and bolts orfastenings for said tubes, arranged to pass through said elbows andprotected by the water circulating through the elbows and Water-spacewith which said elbows connect, substantially as specified.

2. The lining-tubes B, having T-shaped elbows S at their opposite ends,and constructed with countersinks k on the inner ends of said elbows, incombination with the fastening-bolts T, for application to fire-boxeshaving water-jackets, essentially as described.

In testimony whereof I hereunto sign my name in the presence of twosubscribing witnesses.

GEO. H. HOAGLAND.

Witnesses:

HENRY T. BROWN, VERNON H. HARRIS.

